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schreibfaul1 / ESP32-MiniWebRadio

Internetradio with ESP32, I2S DAC and SPI TFT Display with Touchpad
https://www.youtube.com/watch?v=6QbPee2583o
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Could you please add support 4 inch ST7796S display? #175

Closed Hhaltt closed 1 year ago

Hhaltt commented 1 year ago

Link to display
Could you please add support for this display? Touch controller is XPT2046.

schreibfaul1 commented 1 year ago

It looks like ST7796S and ILI9486 use the same instruction set. It might work if you select ILI9486b as TFT_CONTROLLER.

Hhaltt commented 1 year ago

Yes, it works but not correctly. The best result is if ILI9341 is selected as the controller, but the part of the display is just white. If I choose ILI9486 - the picture is strongly shifted to the side and about half of the display is also white. My knowledge does not allow me to fix this

schreibfaul1 commented 1 year ago

If I come across such a display, I will add the ST7796 controller. It looks like the displays will only ship from China, delivery time 3-4 weeks. I can't help right now. If ILI9341 works similarly, you can try changing its height and width, from 320x240 to 480x320. In tft.h line 41 and 42

Hhaltt commented 1 year ago

OK, you were right. The display is fully functional: TFT_CONTROLLER : 4 (ILI9488), TP_VERSION : 4 (ILI9488). It's just that after turning on the power or resetting it does not always work correctly, sometimes it remains just white. The touchscreen also works. And if you want to use the SD card slot on the display, you need to solder a pull-up resistor to the sd-miso pin (3.3v), also on my version of the PCM5102A DAC you need to pull-up to 3.3v on the XMT pin

Hhaltt commented 1 year ago

Thanks, this is a cool project. And one more little wish - if the stream / track playback time were displayed - it would be very good

schreibfaul1 commented 1 year ago

I added the ST7796 TFT controller to the 'small buttons' branch. This branch will soon become the master. It looks like the display is running stable now.

Hhaltt commented 1 year ago

I don't know what's wrong with my display. I think the main reason is that he is Chinese. I tried everything possible with ST7796 and it's just white. I went back to ILI9488, it works. Thank you for your work. By the way VU-meter looks great.

schreibfaul1 commented 1 year ago

I tested these two displays, both with ST7796. The darker one is the Raspberry PI version. Despite the same controller, the displays behave completely differently. image

The initialization of the TFT controllers are mostly very similar to ILI9488 (or ILI9486) and differ only in details. And the gamma (color value) correction can be different. But the main thing is that it works!